Implement superstructure class and tests

Change-Id: If5a2a296ada3dd625ad7eb74af106b36b36ab932
diff --git a/y2019/wpilib_interface.cc b/y2019/wpilib_interface.cc
index 428e723..a6aa098 100644
--- a/y2019/wpilib_interface.cc
+++ b/y2019/wpilib_interface.cc
@@ -111,10 +111,10 @@
         Values::kMaxIntakeEncoderPulsesPerSecond());
 static_assert(kMaxFastEncoderPulsesPerSecond <= 1300000,
               "fast encoders are too fast");
-
 constexpr double kMaxMediumEncoderPulsesPerSecond =
     max(Values::kMaxElevatorEncoderPulsesPerSecond(),
         Values::kMaxWristEncoderPulsesPerSecond());
+
 static_assert(kMaxMediumEncoderPulsesPerSecond <= 400000,
               "medium encoders are too fast");